EP0038211A2 - Isoliertes Kaminrohr - Google Patents

Isoliertes Kaminrohr Download PDF

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Publication number
EP0038211A2
EP0038211A2 EP81301641A EP81301641A EP0038211A2 EP 0038211 A2 EP0038211 A2 EP 0038211A2 EP 81301641 A EP81301641 A EP 81301641A EP 81301641 A EP81301641 A EP 81301641A EP 0038211 A2 EP0038211 A2 EP 0038211A2
Authority
EP
European Patent Office
Prior art keywords
chimney
wall
fibres
chimney pipe
pipe
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP81301641A
Other languages
English (en)
French (fr)
Other versions
EP0038211A3 (en
EP0038211B1 (de
Inventor
Martin Foy
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Insulated Chimneys (Trim) Ltd
Original Assignee
Insulated Chimneys (Trim) Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=10512831&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0038211(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Insulated Chimneys (Trim) Ltd filed Critical Insulated Chimneys (Trim) Ltd
Priority to AT81301641T priority Critical patent/ATE33161T1/de
Publication of EP0038211A2 publication Critical patent/EP0038211A2/de
Publication of EP0038211A3 publication Critical patent/EP0038211A3/en
Application granted granted Critical
Publication of EP0038211B1 publication Critical patent/EP0038211B1/de
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J13/00—Fittings for chimneys or flues 
    • F23J13/02—Linings; Jackets; Casings
    • F23J13/025—Linings; Jackets; Casings composed of concentric elements, e.g. double walled
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F17/00—Vertical ducts; Channels, e.g. for drainage
    • E04F17/02—Vertical ducts; Channels, e.g. for drainage for carrying away waste gases, e.g. flue gases; Building elements specially designed therefor, e.g. shaped bricks or sets thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2213/00—Chimneys or flues
    • F23J2213/20—Joints; Connections
    • F23J2213/202—Joints; Connections between duct or stack sections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2213/00—Chimneys or flues
    • F23J2213/30—Specific materials
    • F23J2213/304—Specific materials ceramic

Definitions

  • the present invention relates to insulated chimney pipes of the type comprising an outer wall within and spaced from which is an inner wall and an end cap at each end of the chimney pipe, the end caps engaging the inner and outer walls and maintaining a predetermined spacing between them.
  • Such chimneys are commonly used to conduct hot waste gases from a domestic solid fuel burner, oil or gas central heating boiler or the like to the atmosphere in place of traditional brick chimneys.
  • chimney pipes must satisfy stringent British Standards tests administered by the Agrkment Board to ensure that they satisfy requirements as to ease of installation and access, adequate service life and low thermal conductivity.
  • Chimney pipes frequently pass through floors and lofts and may thus pass very close to combustible material. It is therefore important that the external temperature of chimney pipes can not rise above a predetermined level, and in order to satisfy the relevant British Standard on this criterion most insulated chimney pipes are of a double wall construction.
  • the inner wall is invariably of stainless steel whilst the outer wall may be of galvanised or vinyl coated steel and spaced from the inner wall by a layer, typically about.40 mm thick, of thermally insulating material such as mineral wool, fire-clay or rock granules.
  • Such conventional two or three wall chimneys with a stainless steel inner wall are intended to have a service life of about 20 years. In practice this service life is not always achieved because of the highly corrosive atmosphere to which the stainless steel is exposed. In particular the action of water formed by condensation and sulphuric acid formed by the combination of this water with sulphur containing gases liberated by the combustion of sulphur containing fuel oils or the like together with the cumulative corrosive effect of thermal shock or stress can lead to a substantial reduction in the service life and in extreme cases the total collapse of the stainless steel wall.
  • the recent increase in the burning of wood in domestic boilers and open fires has exacerbated these problems since the combustion of wood produces wood acids and other particularly corrosive substances which over time attack and ultimately destroy the stainless steel inner wall of the lining.
  • the inner wall is of refractory one-piece moulded construction comprising bonded ceramic fibres.
  • Different types- of fibre may be used such as polycrystalline alumina fibres, e.g. those sold by ICI under the Trade Mark SAFFIL.
  • SAFFIL trade Mark
  • such fibres are expensive and preferably therefore aluminosilicate fibres are used.
  • thermal condutivity of such an inner wall can be very low indeed, and whilst this will vary with temperature is preferably between 0.01 and 0.3 W/mK, e.g. between 0.03 and 0.2 and preferably between 0.04 and 0.06 W/mK at 200°C.
  • the outer wall which may be of conventional type, e.g. of galvanised or vinyl covered steel, is preferably spaced from the inner wall whose width is preferably between 6 and 30 mm merely by an air gap whose width is preferably between 6 and 30 mm.
  • the air gap contributes substantially to the insulating qualities of the chimney pipe but in addition there is preferably air within the material of the inner wall. This not only enhances the insulating qualities.of the inner wall but also reduces its weight without adversely affecting its strength.
  • the density of the material of the inner wall is between 100 and 600 and more particularly between 200 and 400 Kg/ m 3 .
  • the alumino-silicate fibres preferably have a specific gravity of between 1 and 5, more particularly 2 to 4 and a fibre diameter of between 1 and 10p and more preferably 5 and 10 ⁇ .
  • the fibres are preferably bonded together by an inorganic bonding agent, such as alumina or silica and the composition of the material will vary according to the required refractoriness but is preferably between 30 and 80% by weight A1 2 0 3 and 70 and 20% Si0 2 together with minor proportions of various inorganic constituents.
  • the fibres contain between 30 and 40% alumina and between 70 and 60% silica.
  • Such fibres are manufactured by heating either kaolin clay having the required proportions of alumina and silica or alumina and silica in the desired proportions, e.g. in an electric furnace, to a temperature of about 2000°C to melt them and then blowing or spinning the melt to form the fibres. After cooling, the fibres are made into a slurry suitable for moulding into the desired shape and this may be effected either by adding the fibres to a suspension of starch or to an aqueous bonding agent.
  • a suitable bonding agent is that sold by Monsanto under the Trade Mark SYTON which is colloidal silica. If starch is used there is a problem with gel formation resulting in the fibres agglomerating into gelled balls.
  • the moulding process comprises a vacuum moulding process in which the slurry is placed into. forming tanks and a layer of it is then drawn onto a hollow cylindrical porous mandrel or former comprising a tubular foraminous screen by applying a vacuum to its interior. The mandrel is then withdrawn from the slurry, and the damp formed fibres are slid off the mandrel, if necessary after a little predrying has been effected, and the formed chimney pipe is then thoroughly dried.
  • the mechanical integrity of the chimney pipe that is to say its ability to resist cracking and to retain its moulded shape, particularly when it is withdrawn damp from the mandrel but also when it is dry, is dependent not only on the strength of individual ceramic fibres (which is very high) but also on the length of the fibres since the greater the length of the fibres the less will be the tendency of the chimney pipe to crack or even fall apart under its own weight, particularly when damp or under thermal cycling when dry. For this reason it is preferred that the fibres are formed by spinning since this produces longer fibres of e.g. up to 200 mm and typically of 100 mm lenght.
  • the slurry is formed with an aqueous bonding _agent, such as colloidal silica referred to above, rather than starch, since this renders cutting up the fibres unnecessary which is both an additional manufacturing step and of course results in shorter fibres.
  • an aqueous bonding _agent such as colloidal silica referred to above, rather than starch, since this renders cutting up the fibres unnecessary which is both an additional manufacturing step and of course results in shorter fibres.
  • the'fibres thus have an average length of about 100 mm, and in any case preferably greater than 30 mm which is about three times greater than when using starch as a bonding agent.
  • a pipe formed of such alumino silicate fibres is extremely refractory and capable of operating indefinitely at a temperature of 1200°C and above up to about 1600°C, depending on the proportion of alumina. If it is desired that the chimney should be able to operate at the upper end of this range it may be desirable to add a proportion of high temperature ceramic fibres, e.g.. polycrystalline alumina fibres such as those sold under the Trade Mark SAFFIL referred to above.
  • SAFFIL Trade Mark
  • Such a pipe has a high resistance to thermal shock, largely due to the fact that its coefficient of expansion is effectively zero and extremely low thermal conductivity. Its thermal conductivity is in fact about one third of that of rock wool and about one tenth that of fire brick. Chemically it is inert, except to strong alkalis and to hydrofluoric and like strong acids, and it is unaffected by steam, oil or water. It is not subject to cracking or shrinkage and is extremely dimensionally stable.
  • a domestic chimney pipe in accordance with the invention preferably comprises two or more interconnected sections.
  • Each end of each section, with the exception of the upper end of the upper section and the lower end of the lower section are preferably of either male or female configuration to engage the end of an adjacent section.
  • the inner and outer walls of each section are preferably connected by an end cap which may be of metal or bonded aluminosilicate fibres which affords the male or female profile.
  • FIG. 1 shows a domestic coal burning fire 2 having a chimney in accordance with the invention comprising a number of interconnected sections 4.
  • the chimney is shown as passing through two floors, where it is retained in position by a conventional fire stop 6, and through the roof of the house where it is provided with a conventional flashing 8 and storm collar 10 and is capped by a terminal cap 12.
  • Figures 2 and 3 show a typical chimney section 4 which comprises an outer wall 14 of galvanised steel about 0.5 mm thick coaxially disposed within which is an inner wall 16 of bonded alumino-silicate fibres.
  • the internal diameter of the chimney is between 12 and 20 cms, and the thickness of the inner wall and the thickness of the air gap between the inner and outer walls are both about 20 mm.
  • the inner wall composition is 34.5% alumina and 64.7% silica, with the balance being inorganic impurities such as oxides of iron, sodium and boron.
  • the wall is formed of alumino-silicate fibres as described above and has a maximum continuous working temperature of 1260°C. Its melting temperature is 1760°C and its density is 240 Kg/m 3 . This working temperature should be adequate for most purposes, but if desired more alumina may be used, in which case the maximum working temperature may be increased to 1600°C.
  • the inner wall 16 is provided at its upper end with an internal 45 0 bevel 18 to form a female end and a complementary external 45° bevel 20 at its lower end to form a male end.
  • the chimney section is provided with a stainless steel end cap 22 which has a lip 24 which extends a short distance along the inner surface of the inner wall, a portion which lies against the bevelled sections 18 and 20 and is crimped to the outer wall to secure it to the inner wall.
  • the two end caps have complementary formations, such as short screw threads (not shown) to enable adjacent sections to be connected together.
  • the connection is then completed by a jubilee clip which passes around the joint in the conventional manner and which engages in the two peripheral grooves 26 formed in the outer wall.
  • FIG. 4 shows a modified'embodiment and the same reference numerals are used to designate similar items.
  • the metallic end caps 22 are replaced by 40 board end caps 30 of bonded alumino silicate fibres. These have a shape which corresponds to that of the metallic end caps and may be moulded integrally with the inner wall 16 of the chimney or, as in this embodiment, are moulded and then subsequently bonded to it.
  • the outer metallic wall 14 is connected to these end caps 30 by bonding or by crimping or otherwise deforming it over or into the end caps as at 32.
  • This construction has the advantage that heat loss to the exterior is still further reduced since the metallic conductive path constituted by the end caps is replaced by low conductivity ceramic fibres.
  • the one component which is possibly subject to corrosion is replaced by a corrosion free component.
  • Ceramic fibre end caps are not suitable for having a screw thread formed in them, so adjacent chimney sections are merely connected by the jubilee clip or a toggle clip.
  • the outer surface of the inner wall 16 is covered by a galvanised steel liner 34.
  • This liner facilitates the moulding of the inner wall and gives the finished wall greater mechanical strength.
  • the gap between the inner and outer walls is filled with insulating material, in this case an aluminosilicate fibre blanket 36, to further increase the thermal insulation property of the chimney.
  • the interior surface of the ceramic fibre inner wall may be relatively soft, and this can be disadvantageous under certain circumstances, e.g. if it is desired to sweep the chimney.
  • the interior surface of the inner wall is coated, e.g. by spraying, with a heat resistant substance, based for example on silica, which improves its'heat and abrasion resistance.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Thermal Insulation (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Building Environments (AREA)
  • Working Measures On Existing Buildindgs (AREA)
  • Eye Examination Apparatus (AREA)
  • Element Separation (AREA)
  • Sanitary Thin Papers (AREA)
  • Catching Or Destruction (AREA)
  • Lubricants (AREA)
EP81301641A 1980-04-16 1981-04-14 Isoliertes Kaminrohr Expired EP0038211B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81301641T ATE33161T1 (de) 1980-04-16 1981-04-14 Isoliertes kaminrohr.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8012578 1980-04-16
GB8012578A GB2073841B (en) 1980-04-16 1980-04-16 Insulated chimney pipes

Publications (3)

Publication Number Publication Date
EP0038211A2 true EP0038211A2 (de) 1981-10-21
EP0038211A3 EP0038211A3 (en) 1982-04-21
EP0038211B1 EP0038211B1 (de) 1988-03-23

Family

ID=10512831

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81301641A Expired EP0038211B1 (de) 1980-04-16 1981-04-14 Isoliertes Kaminrohr

Country Status (9)

Country Link
US (1) US4573400A (de)
EP (1) EP0038211B1 (de)
AT (1) ATE33161T1 (de)
CA (1) CA1141933A (de)
DE (1) DE3176691D1 (de)
DK (1) DK172781A (de)
GB (1) GB2073841B (de)
IE (1) IE52042B1 (de)
NO (1) NO159743C (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0085455A1 (de) * 1982-01-28 1983-08-10 Amgas B.V. Wärmedämmendes Rohrstück
EP0098086B1 (de) * 1982-06-24 1987-01-21 Household Manufacturing Limited Vorgefertigtes Schornsteinelement
EP0341523A1 (de) * 1988-05-09 1989-11-15 RMB-Handels AG Kaminrohrelement

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8203647A (nl) * 1982-09-21 1984-04-16 Amgas Bv Werkwijze voor het vervaardigen van een vezelachtige warmte-isolerende laag met een samenhangende structuur alsmede op een met deze werkwijze vervaardigde laag en een warmte-isolerend element voorzien van een dergelijke laag.
US4607665A (en) * 1985-05-20 1986-08-26 Marco Manufacturing, Inc. Pipe spacer
US4929000A (en) * 1988-12-02 1990-05-29 American Metal Products Company Multiple walled chimney
FR2649470B1 (fr) * 1989-07-05 1991-10-18 Hutchinson Sa Revetement de protection contre la chaleur et le feu pour tuyaux et structures analogues de forme allongee
DE4106835C2 (de) * 1991-03-04 1994-10-06 Karl Heinz Vahlbrauk Fertigschornstein
US6068027A (en) * 1996-03-06 2000-05-30 Seamark Systems Limited Pipeline insulation
FR2756606B1 (fr) * 1996-12-04 1999-01-22 Const Metalliques Mecaniques B Conduit metallique modulaire a emboitement, notamment pour l'evacuation des fumees
FR2803896A1 (fr) * 2000-01-17 2001-07-20 Pomel Ets Conduit, notamment conduit de fumee, avec conduit de ventilation concentrique
DE10010692C1 (de) * 2000-03-04 2001-07-19 Willi Skoberne Schornstein
FI108316B (fi) * 2000-04-12 2001-12-31 Flaekt Oy Ilmastointikanavisto
CA2432703A1 (en) * 2003-06-18 2004-12-18 Cheminee Lining.E Inc. Joint assembly for chimney components
US7322378B2 (en) * 2004-10-28 2008-01-29 Winbond Electronics Corp. Semiconductor apparatuses and pipe supports thereof
CA2621526A1 (en) * 2007-02-12 2008-08-12 John E. Meredith Materials and methods for lining a chimney
US10280639B2 (en) * 2007-02-12 2019-05-07 John E. Meredith Materials and methods for lining a chimney
CN105465809A (zh) * 2016-01-14 2016-04-06 北京金大华中环保技术有限公司 玻璃钢花瓣体及使用该玻璃钢花瓣体的烟囱防腐内衬体
RU168208U1 (ru) * 2016-08-25 2017-01-24 Акционерное общество "Авангард" Дымовая труба
CN111101688A (zh) * 2020-01-13 2020-05-05 杭州磐程室内环境技术有限公司 一种用于厨卫的排气道

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US285112A (en) * 1883-09-18 Portable chimney
US425601A (en) * 1890-04-15 Hot-air pipe
US2101270A (en) * 1935-03-14 1937-12-07 Freyn Engineering Co Blowpipe
US2120309A (en) * 1935-11-11 1938-06-14 American Concrete And Steel Pi Method of applying noncorrosive surfaces to pipe and the like
CH221376A (de) * 1941-04-01 1942-05-31 Sulzer Ag Aus einzelnen Abschnitten bestehende, doppelwandige Rohrleitung für Flüssigkeiten oder Gase hoher Temperatur.
US2457470A (en) * 1945-12-05 1948-12-28 Ernest O Howle Insulated chimney
US2759491A (en) * 1953-10-27 1956-08-21 Nat Clay Pipe Res Corp Coaxial conduit construction
GB894056A (en) * 1958-02-03 1962-04-18 Carborundum Co Ceramic fibre products and compositions and methods of making same
DE1268812B (de) * 1958-07-28 1968-05-22 Hein Ruck Metallschornstein
US3170544A (en) * 1962-03-01 1965-02-23 William Wallace Corp Prefabricated metal chimney
GB1032469A (en) * 1963-12-23 1966-06-08 Max Beaumont Improvements in or relating to insulated chimneys and flues
GB1156972A (en) * 1966-05-19 1969-07-02 Grateheat Ltd Insulated Chimneys
DE1922581C3 (de) * 1968-05-02 1980-01-17 Betonwerk Muenchen, Schiedel-Kamin, 8000 Muenchen Kamin aus Fertigteilen
GB1328493A (en) * 1969-08-21 1973-08-30 Morganite Ceramics Fibres Ltd Refractory insulating compositions
US3628572A (en) * 1969-12-29 1971-12-21 Owens Corning Fiberglass Corp Pipe insulation and method of installing same
US3768523A (en) * 1971-06-09 1973-10-30 C Schroeder Ducting
JPS49111254A (de) * 1973-02-24 1974-10-23
JPS49111255A (de) * 1973-02-26 1974-10-23
GB1506152A (en) * 1975-03-27 1978-04-05 Morganite Ceramic Fibres Ltd Aluminio-silicate refractory fibre mix
DE2736655C2 (de) * 1977-08-13 1982-09-09 Lenz & Dörrenberg, 5000 Köln Formstück für Schornsteine u.dgl.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0085455A1 (de) * 1982-01-28 1983-08-10 Amgas B.V. Wärmedämmendes Rohrstück
EP0098086B1 (de) * 1982-06-24 1987-01-21 Household Manufacturing Limited Vorgefertigtes Schornsteinelement
EP0341523A1 (de) * 1988-05-09 1989-11-15 RMB-Handels AG Kaminrohrelement

Also Published As

Publication number Publication date
EP0038211A3 (en) 1982-04-21
NO811319L (no) 1981-10-19
GB2073841A (en) 1981-10-21
IE810860L (en) 1981-10-16
DE3176691D1 (en) 1988-04-28
NO159743C (no) 1989-02-01
EP0038211B1 (de) 1988-03-23
IE52042B1 (en) 1987-05-27
US4573400A (en) 1986-03-04
NO159743B (no) 1988-10-24
ATE33161T1 (de) 1988-04-15
DK172781A (da) 1981-10-17
CA1141933A (en) 1983-03-01
GB2073841B (en) 1985-04-17

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